Hi Pranith & Ravi,
Sorry for the delay. I have the profile info for the past couple of
days just below. Is this of any help to you or is there additional
information I can request?
Brick: mseas-data2:/mnt/brick2
------------------------------
Cumulative Stats:
Block Size: 1b+ 2b+ 4b+
No. of Reads: 6 38 1144
No. of Writes: 108032195 8352125 141319922
Block Size: 8b+ 16b+ 32b+
No. of Reads: 689 1256 2756
No. of Writes: 13946933 20694915 57845473
Block Size: 64b+ 128b+ 256b+
No. of Reads: 5522 56492 149462
No. of Writes: 714398165 11923303 2537176
Block Size: 512b+ 1024b+ 2048b+
No. of Reads: 64285 192872 200488
No. of Writes: 5975842 217173849 94536339
Block Size: 4096b+ 8192b+ 16384b+
No. of Reads: 300021 764297 1613672
No. of Writes: 112481858 53164978 330177486
Block Size: 32768b+ 65536b+ 131072b+
No. of Reads: 5101884 14470916 4958306977
No. of Writes: 35098110 19969017 2243344759
Block Size: 262144b+
No. of Reads: 0
No. of Writes: 547
%-latency Avg-latency Min-Latency Max-Latency No. of
calls Fop
--------- ----------- ----------- -----------
------------ ----
0.00 0.00 us 0.00 us 0.00 us 4052087 FORGET
0.00 0.00 us 0.00 us 0.00 us 6381234 RELEASE
0.00 0.00 us 0.00 us 0.00 us 28716633 RELEASEDIR
0.00 92.81 us 48.00 us 130.00 us 53
READLINK
0.00 201.22 us 112.00 us 457.00 us
188 RMDIR
0.00 169.36 us 53.00 us 20417.00 us 347
SETXATTR
0.00 20497.89 us 241.00 us 57505.00 us 45
SYMLINK
0.00 116.97 us 42.00 us 39168.00 us 9172
SETATTR
0.00 380.06 us 76.00 us 198427.00 us
3133 LINK
0.00 149.60 us 14.00 us 601941.00 us 14426
INODELK
0.00 387.81 us 69.00 us 161114.00 us
6617 RENAME
0.01 96.47 us 14.00 us 1224734.00 us
63599 STATFS
0.01 25041.48 us 299.00 us 93211.00 us
348 MKDIR
0.01 380.41 us 31.00 us 561724.00 us
31452 OPEN
0.02 1346.42 us 64.00 us 226741.00 us
18306 UNLINK
0.02 2123.19 us 42.00 us 802398.00 us 12370
FTRUNCATE
0.04 12161.88 us 175.00 us 158072.00 us
3244 MKNOD
0.07 132801.87 us 39.00 us 3144448.00 us
532 FSYNC
0.13 89.98 us 4.00 us 5550246.00 us 1492793 FLUSH
0.45 65.89 us 6.00 us 3608035.00 us 7194229 FSTAT
0.57 14538.33 us 162.00 us 4577282.00 us
41466 CREATE
0.70 3183.52 us 16.00 us 4358324.00 us 231728
OPENDIR
1.67 7559.32 us 8.00 us 4193443.00 us
234012 STAT
2.26 119.27 us 11.00 us 4491219.00 us 20093638 WRITE
2.51 207.00 us 10.00 us 4993074.00 us 12884466 READ
4.17 246.12 us 13.00 us 8857354.00 us 17952607 GETXATTR
23.72 48775.51 us 14.00 us 5022445.00 us 515770
READDIRP
63.65 1238.53 us 25.00 us 4483760.00 us 54507520 LOOKUP
Duration: 9810315 seconds
Data Read: 651660783328883 bytes
Data Written: 305412177327433 bytes
Interval 0 Stats:
Block Size: 1b+ 2b+ 4b+
No. of Reads: 6 38 1144
No. of Writes: 108032195 8352125 141319922
Block Size: 8b+ 16b+ 32b+
No. of Reads: 689 1256 2756
No. of Writes: 13946933 20694915 57845473
Block Size: 64b+ 128b+ 256b+
No. of Reads: 5522 56492 149462
No. of Writes: 714398165 11923303 2537176
Block Size: 512b+ 1024b+ 2048b+
No. of Reads: 64285 192872 200488
No. of Writes: 5975842 217173849 94536339
Block Size: 4096b+ 8192b+ 16384b+
No. of Reads: 300021 764297 1613672
No. of Writes: 112481858 53164978 330177486
Block Size: 32768b+ 65536b+ 131072b+
No. of Reads: 5101884 14470916 4958306977
No. of Writes: 35098110 19969017 2243344759
Block Size: 262144b+
No. of Reads: 0
No. of Writes: 547
%-latency Avg-latency Min-Latency Max-Latency No. of
calls Fop
--------- ----------- ----------- -----------
------------ ----
0.00 0.00 us 0.00 us 0.00 us 4052087 FORGET
0.00 0.00 us 0.00 us 0.00 us 6381233 RELEASE
0.00 0.00 us 0.00 us 0.00 us 28716630 RELEASEDIR
0.00 92.81 us 48.00 us 130.00 us 53
READLINK
0.00 201.22 us 112.00 us 457.00 us
188 RMDIR
0.00 169.36 us 53.00 us 20417.00 us 347
SETXATTR
0.00 20497.89 us 241.00 us 57505.00 us 45
SYMLINK
0.00 116.97 us 42.00 us 39168.00 us 9172
SETATTR
0.00 380.06 us 76.00 us 198427.00 us
3133 LINK
0.00 149.60 us 14.00 us 601941.00 us 14426
INODELK
0.00 387.81 us 69.00 us 161114.00 us
6617 RENAME
0.01 96.47 us 14.00 us 1224734.00 us
63599 STATFS
0.01 25041.48 us 299.00 us 93211.00 us
348 MKDIR
0.01 380.41 us 31.00 us 561724.00 us
31452 OPEN
0.02 1346.42 us 64.00 us 226741.00 us
18306 UNLINK
0.02 2123.19 us 42.00 us 802398.00 us 12370
FTRUNCATE
0.04 12161.88 us 175.00 us 158072.00 us
3244 MKNOD
0.07 132801.87 us 39.00 us 3144448.00 us
532 FSYNC
0.13 89.98 us 4.00 us 5550246.00 us 1492793 FLUSH
0.45 65.89 us 6.00 us 3608035.00 us 7194229 FSTAT
0.57 14538.33 us 162.00 us 4577282.00 us
41466 CREATE
0.70 3183.52 us 16.00 us 4358324.00 us 231728
OPENDIR
1.67 7559.32 us 8.00 us 4193443.00 us
234012 STAT
2.26 119.27 us 11.00 us 4491219.00 us 20093638 WRITE
2.51 207.00 us 10.00 us 4993074.00 us 12884466 READ
4.17 246.12 us 13.00 us 8857354.00 us 17952607 GETXATTR
23.72 48775.51 us 14.00 us 5022445.00 us 515770
READDIRP
63.65 1238.53 us 25.00 us 4483760.00 us 54507520 LOOKUP
Duration: 9810315 seconds
Data Read: 651660783328883 bytes
Data Written: 305412177327433 bytes
Brick: mseas-data2:/mnt/brick1
------------------------------
Cumulative Stats:
Block Size: 1b+ 2b+ 4b+
No. of Reads: 4 38 1482
No. of Writes: 643631512 59055444 235532859
Block Size: 8b+ 16b+ 32b+
No. of Reads: 1171 2138 4748
No. of Writes: 31816870 23602175 50161322
Block Size: 64b+ 128b+ 256b+
No. of Reads: 9461 65360 165954
No. of Writes: 711114605 11760241 4078907
Block Size: 512b+ 1024b+ 2048b+
No. of Reads: 94563 226053 258803
No. of Writes: 6366990 211643393 95831137
Block Size: 4096b+ 8192b+ 16384b+
No. of Reads: 383871 1032345 2244921
No. of Writes: 155833532 57850303 339892660
Block Size: 32768b+ 65536b+ 131072b+
No. of Reads: 7588068 22368398 5387488199
No. of Writes: 38588368 25195605 2463004132
Block Size: 262144b+
No. of Reads: 0
No. of Writes: 489
%-latency Avg-latency Min-Latency Max-Latency No. of
calls Fop
--------- ----------- ----------- -----------
------------ ----
0.00 0.00 us 0.00 us 0.00 us 4060396 FORGET
0.00 0.00 us 0.00 us 0.00 us 6244016 RELEASE
0.00 0.00 us 0.00 us 0.00 us 28716852 RELEASEDIR
0.00 96.42 us 61.00 us 148.00 us 40
READLINK
0.00 208.36 us 114.00 us 322.00 us
188 RMDIR
0.00 2231.61 us 57.00 us 716342.00 us 347
SETXATTR
0.00 20821.92 us 758.00 us 57852.00 us 38
SYMLINK
0.00 519.11 us 76.00 us 952378.00 us
3149 LINK
0.00 196.97 us 50.00 us 736928.00 us 9055
SETATTR
0.00 164.34 us 18.00 us 736161.00 us 13460
INODELK
0.00 375.54 us 73.00 us 198362.00 us
6274 RENAME
0.01 20913.10 us 351.00 us 102696.00 us
348 MKDIR
0.01 151.39 us 17.00 us 782025.00 us
63598 STATFS
0.03 1103.67 us 34.00 us 618187.00 us
29597 OPEN
0.03 2833.17 us 43.00 us 1069257.00 us 11693
FTRUNCATE
0.04 2267.87 us 61.00 us 3746134.00 us
17859 UNLINK
0.04 13105.16 us 254.00 us 179505.00 us
3177 MKNOD
0.05 88496.76 us 21.00 us 1718559.00 us
613 FSYNC
0.58 73.42 us 6.00 us 1917794.00 us 7848483 FSTAT
0.71 17177.23 us 177.00 us 7077794.00 us
40554 CREATE
0.79 585.79 us 3.00 us 11107703.00 us
1322036 FLUSH
1.72 7459.40 us 9.00 us 2764285.00 us
228033 STAT
1.96 8350.73 us 19.00 us 2235725.00 us 231728
OPENDIR
2.60 115.35 us 12.00 us 4196355.00 us 22239110 WRITE
4.60 313.20 us 10.00 us 6211594.00 us 14494253 READ
5.98 307.95 us 13.00 us 9885480.00 us 19163193 GETXATTR
25.68 48514.34 us 17.00 us 4734636.00 us 522162
READDIRP
55.15 1075.93 us 26.00 us 4291535.00 us 50562855 LOOKUP
Duration: 9810315 seconds
Data Read: 708869551853133 bytes
Data Written: 335305857076797 bytes
Interval 0 Stats:
Block Size: 1b+ 2b+ 4b+
No. of Reads: 4 38 1482
No. of Writes: 643631512 59055444 235532859
Block Size: 8b+ 16b+ 32b+
No. of Reads: 1171 2138 4748
No. of Writes: 31816870 23602175 50161322
Block Size: 64b+ 128b+ 256b+
No. of Reads: 9461 65360 165954
No. of Writes: 711114605 11760241 4078907
Block Size: 512b+ 1024b+ 2048b+
No. of Reads: 94563 226053 258803
No. of Writes: 6366990 211643393 95831137
Block Size: 4096b+ 8192b+ 16384b+
No. of Reads: 383871 1032345 2244921
No. of Writes: 155833532 57850303 339892660
Block Size: 32768b+ 65536b+ 131072b+
No. of Reads: 7588068 22368398 5387488199
No. of Writes: 38588368 25195605 2463004132
Block Size: 262144b+
No. of Reads: 0
No. of Writes: 489
%-latency Avg-latency Min-Latency Max-Latency No. of
calls Fop
--------- ----------- ----------- -----------
------------ ----
0.00 0.00 us 0.00 us 0.00 us 4060397 FORGET
0.00 0.00 us 0.00 us 0.00 us 6244015 RELEASE
0.00 0.00 us 0.00 us 0.00 us 28716850 RELEASEDIR
0.00 96.42 us 61.00 us 148.00 us 40
READLINK
0.00 208.36 us 114.00 us 322.00 us
188 RMDIR
0.00 2231.61 us 57.00 us 716342.00 us 347
SETXATTR
0.00 20821.92 us 758.00 us 57852.00 us 38
SYMLINK
0.00 519.11 us 76.00 us 952378.00 us
3149 LINK
0.00 196.97 us 50.00 us 736928.00 us 9055
SETATTR
0.00 164.34 us 18.00 us 736161.00 us 13460
INODELK
0.00 375.54 us 73.00 us 198362.00 us
6274 RENAME
0.01 20913.10 us 351.00 us 102696.00 us
348 MKDIR
0.01 151.39 us 17.00 us 782025.00 us
63598 STATFS
0.03 1103.67 us 34.00 us 618187.00 us
29597 OPEN
0.03 2833.17 us 43.00 us 1069257.00 us 11693
FTRUNCATE
0.04 2267.87 us 61.00 us 3746134.00 us
17859 UNLINK
0.04 13105.16 us 254.00 us 179505.00 us
3177 MKNOD
0.05 88496.76 us 21.00 us 1718559.00 us
613 FSYNC
0.58 73.42 us 6.00 us 1917794.00 us 7848483 FSTAT
0.71 17177.23 us 177.00 us 7077794.00 us
40554 CREATE
0.79 585.79 us 3.00 us 11107703.00 us
1322036 FLUSH
1.72 7459.40 us 9.00 us 2764285.00 us
228033 STAT
1.96 8350.73 us 19.00 us 2235725.00 us 231728
OPENDIR
2.60 115.35 us 12.00 us 4196355.00 us 22239110 WRITE
4.60 313.20 us 10.00 us 6211594.00 us 14494253 READ
5.98 307.95 us 13.00 us 9885480.00 us 19163193 GETXATTR
25.68 48514.34 us 17.00 us 4734636.00 us 522162
READDIRP
55.15 1075.93 us 26.00 us 4291535.00 us 50562855 LOOKUP
Duration: 9810315 seconds
Data Read: 708869551853133 bytes
Data Written: 335305857076797 bytes
On 04/14/2017 02:50 AM, Pranith Kumar Karampuri wrote:
On Sat, Apr 8, 2017 at 10:28 AM, Ravishankar N <[email protected]
<mailto:[email protected]>> wrote:
Hi Pat,
I'm assuming you are using gluster native (fuse mount). If it
helps, you could try mounting it via gluster NFS (gnfs) and then
see if there is an improvement in speed. Fuse mounts are slower
than gnfs mounts but you get the benefit of avoiding a single
point of failure. Unlike fuse mounts, if the gluster node
containing the gnfs server goes down, all mounts done using that
node will fail). For fuse mounts, you could try tweaking the
write-behind xlator settings to see if it helps. See the
performance.write-behind and performance.write-behind-window-size
options in `gluster volume set help`. Of course, even for gnfs
mounts, you can achieve fail-over by using CTDB.
Ravi,
Do you have any data that suggests fuse mounts are slower than
gNFS servers?
Pat,
I see that I am late to the thread, but do you happen to have
"profile info" of the workload?
You can follow
https://gluster.readthedocs.io/en/latest/Administrator%20Guide/Monitoring%20Workload/
to get the information.
Thanks,
Ravi
On 04/08/2017 12:07 AM, Pat Haley wrote:
Hi,
We noticed a dramatic slowness when writing to a gluster disk
when compared to writing to an NFS disk. Specifically when using
dd (data duplicator) to write a 4.3 GB file of zeros:
* on NFS disk (/home): 9.5 Gb/s
* on gluster disk (/gdata): 508 Mb/s
The gluser disk is 2 bricks joined together, no replication or
anything else. The hardware is (literally) the same:
* one server with 70 hard disks and a hardware RAID card.
* 4 disks in a RAID-6 group (the NFS disk)
* 32 disks in a RAID-6 group (the max allowed by the card,
/mnt/brick1)
* 32 disks in another RAID-6 group (/mnt/brick2)
* 2 hot spare
Some additional information and more tests results (after
changing the log level):
glusterfs 3.7.11 built on Apr 27 2016 14:09:22
CentOS release 6.8 (Final)
RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS-3
3108 [Invader] (rev 02)
*Create the file to /gdata (gluster)*
[root@mseas-data2 gdata]# dd if=/dev/zero of=/gdata/zero1 bs=1M
count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 1.91876 s, *546 MB/s*
*Create the file to /home (ext4)*
[root@mseas-data2 gdata]# dd if=/dev/zero of=/home/zero1 bs=1M
count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 0.686021 s, *1.5 GB/s - *3
times as fast*
Copy from /gdata to /gdata (gluster to gluster)
*[root@mseas-data2 gdata]# dd if=/gdata/zero1 of=/gdata/zero2
2048000+0 records in
2048000+0 records out
1048576000 bytes (1.0 GB) copied, 101.052 s, *10.4 MB/s* -
realllyyy slooowww
*Copy from /gdata to /gdata* *2nd time *(gluster to gluster)**
[root@mseas-data2 gdata]# dd if=/gdata/zero1 of=/gdata/zero2
2048000+0 records in
2048000+0 records out
1048576000 bytes (1.0 GB) copied, 92.4904 s, *11.3 MB/s* -
realllyyy slooowww again
*Copy from /home to /home (ext4 to ext4)*
[root@mseas-data2 gdata]# dd if=/home/zero1 of=/home/zero2
2048000+0 records in
2048000+0 records out
1048576000 bytes (1.0 GB) copied, 3.53263 s, *297 MB/s *30 times
as fast
*Copy from /home to /home (ext4 to ext4)*
[root@mseas-data2 gdata]# dd if=/home/zero1 of=/home/zero3
2048000+0 records in
2048000+0 records out
1048576000 bytes (1.0 GB) copied, 4.1737 s, *251 MB/s* - 30 times
as fast
As a test, can we copy data directly to the xfs mountpoint
(/mnt/brick1) and bypass gluster?
Any help you could give us would be appreciated.
Thanks
--
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley Email:[email protected]
<mailto:[email protected]>
Center for Ocean Engineering Phone: (617) 253-6824
Dept. of Mechanical Engineering Fax: (617) 253-8125
MIT, Room 5-213http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA 02139-4301
_______________________________________________
Gluster-users mailing list
[email protected] <mailto:[email protected]>
http://lists.gluster.org/mailman/listinfo/gluster-users
<http://lists.gluster.org/mailman/listinfo/gluster-users>
_______________________________________________ Gluster-users
mailing list [email protected]
<mailto:[email protected]>
http://lists.gluster.org/mailman/listinfo/gluster-users
<http://lists.gluster.org/mailman/listinfo/gluster-users>
--
Pranith
--
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Pat Haley Email: [email protected]
Center for Ocean Engineering Phone: (617) 253-6824
Dept. of Mechanical Engineering Fax: (617) 253-8125
MIT, Room 5-213 http://web.mit.edu/phaley/www/
77 Massachusetts Avenue
Cambridge, MA 02139-4301
_______________________________________________
Gluster-users mailing list
[email protected]
http://lists.gluster.org/mailman/listinfo/gluster-users
